KANDOlite's LED bulbs give an energy savings of up to 46% compared to F32T8 system. They are a perfect retrofit for traditional lamps for INSTA START circuit with no dimension change. They are also compatible with most existing ballasts. It operates smoothly, even at low temperatures down to -20° celcius. Easily plug and play, so no re-wiring cost. It is made with a full glass body with plastic shatter-proof guard. Comes with a 5 year Warranty.